In most countries, the police must respond to your complaint. They cannot just file it away or suppress it. They must talk to you and to your partner separately and obtain written and signed statements from both parties. The police officer on the scene must inform you of your legal options. The officer in charge must also furnish you with a list of domestic violence shelters and other forms of help available in your community.
(From the book "Malignant Self-love: Narcissism Revisited" by Sam Vaknin - Click on this link to purchase: http://www.narcissistic-abuse.com/thebook.html)